Some probiotics can lead to bloating – if they are gas producing. Less gas producing probiotics include bifidobacteria and lactobacillus. I am currently investigating the soil-based Prescript-Assist probiotics and will do a post on these in the coming months.
In general, they don’t seem to do much harm, but also haven’t had a magic bullet effect either. The challenge likely has to do with the fact that our gut microbiome is so vast, diverse and complex. Expecting miracles from current probiotics may be unreasonable.